Changing your own oil is a great way to save money, and you can save even more with this deal from Amazon. All you have to do is buy a container of highly-rated Royal Purple oil, and you'll get the filter for free. [Free Filter with Oil Purchase, Amazon]

Update: The high end model appears to be sold out right now, but Amazon will occasionally put them back on sale after a short break, so keep checking back.

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Bring your old car into the future with a couple of inexpensive upgrades. This backup camera is only $20 today with promo code 6GVS5Z7I. You'll still need a screen to go with it, but that's a great price to get you started.

Ringke cases are some of the least obtrusive skins that you can put on your phone, and you can get several models today for just $5 or $6 with promo code 7RIE7K3C. [Ringke Phone Cases, Promo Code 7RIE7K3C]

If you've been filling up you phone with photos and videos, this wireless flash reader can transfer them straight to a USB drive or SD card for safe keeping. It's compatible with iOS, Android, and Kindles, and I certainly wish I had known about it before my last vacation. [Kingston MobileLite Wireless Flash Reader, $30]

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